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Problems/Service/RepairsIf you have a problem with your HHR, want a tip on repairing or performing a particular service to you HHR here is the place to post!
Next would be a compression test. The way the ICM works is called "compression sense ignition" it is compression that alters the signal from the spark plug. Then all of that data goes to the ECM which controls the injectors.
I said "resistance" earlier for simplicity.
Next would be a compression test. The way the ICM works is called "compression sense ignition" it is compression that alters the signal from the spark plug. Then all of that data goes to the ECM which controls the injectors.
I said "resistance" earlier for simplicity.
I'm pretty sure you've forgotten more than I know about automobiles. Thank you for your assistance.
I replaced the thermostat per the instructions on another thread and am currently test driving. Thus far temperatures are roughly 192° +/-2.5°. The HHR definitely seems to be happier.
The attached thingamajig was immensely helpful for carefully opening and closing the petkawk valve. Thingamajig and a 1/4" ratchet
It's still shuddering but only at idle.
It's not shuddering as bad as it was, but it's noticable.
I'll post compression readings once it stops raining.
